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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2006, 2007, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef RenderBoxModelObject_h
#define RenderBoxModelObject_h
#include "core/rendering/RenderLayerModelObject.h"
#include "core/rendering/style/ShadowData.h"
#include "platform/geometry/LayoutRect.h"
namespace blink {
// Modes for some of the line-related functions.
enum LinePositionMode { PositionOnContainingLine, PositionOfInteriorLineBoxes };
enum LineDirectionMode { HorizontalLine, VerticalLine };
typedef unsigned BorderEdgeFlags;
enum BackgroundBleedAvoidance {
BackgroundBleedNone,
BackgroundBleedShrinkBackground,
BackgroundBleedClipBackground,
BackgroundBleedBackgroundOverBorder,
};
enum ContentChangeType {
ImageChanged,
CanvasChanged,
CanvasContextChanged
};
class InlineFlowBox;
// This class is the base for all objects that adhere to the CSS box model as described
// at http://www.w3.org/TR/CSS21/box.html
class RenderBoxModelObject : public RenderLayerModelObject {
public:
RenderBoxModelObject(ContainerNode*);
virtual ~RenderBoxModelObject();
LayoutSize relativePositionOffset() const;
LayoutSize relativePositionLogicalOffset() const { return style()->isHorizontalWritingMode() ? relativePositionOffset() : relativePositionOffset().transposedSize(); }
LayoutSize offsetForInFlowPosition() const;
// IE extensions. Used to calculate offsetWidth/Height. Overridden by inlines (RenderFlow)
// to return the remaining width on a given line (and the height of a single line).
virtual LayoutUnit offsetLeft() const;
virtual LayoutUnit offsetTop() const;
virtual LayoutUnit offsetWidth() const = 0;
virtual LayoutUnit offsetHeight() const = 0;
int pixelSnappedOffsetLeft() const { return roundToInt(offsetLeft()); }
int pixelSnappedOffsetTop() const { return roundToInt(offsetTop()); }
virtual int pixelSnappedOffsetWidth() const;
virtual int pixelSnappedOffsetHeight() const;
virtual void updateFromStyle() override;
// This will work on inlines to return the bounding box of all of the lines' border boxes.
virtual IntRect borderBoundingBox() const = 0;
// These return the CSS computed padding values.
LayoutUnit computedCSSPaddingTop() const { return computedCSSPadding(style()->paddingTop()); }
LayoutUnit computedCSSPaddingBottom() const { return computedCSSPadding(style()->paddingBottom()); }
LayoutUnit computedCSSPaddingLeft() const { return computedCSSPadding(style()->paddingLeft()); }
LayoutUnit computedCSSPaddingRight() const { return computedCSSPadding(style()->paddingRight()); }
LayoutUnit computedCSSPaddingBefore() const { return computedCSSPadding(style()->paddingBefore()); }
LayoutUnit computedCSSPaddingAfter() const { return computedCSSPadding(style()->paddingAfter()); }
LayoutUnit computedCSSPaddingStart() const { return computedCSSPadding(style()->paddingStart()); }
LayoutUnit computedCSSPaddingEnd() const { return computedCSSPadding(style()->paddingEnd()); }
// These functions are used during layout. Table cells
// override them to include some extra intrinsic padding.
virtual LayoutUnit paddingTop() const { return computedCSSPaddingTop(); }
virtual LayoutUnit paddingBottom() const { return computedCSSPaddingBottom(); }
virtual LayoutUnit paddingLeft() const { return computedCSSPaddingLeft(); }
virtual LayoutUnit paddingRight() const { return computedCSSPaddingRight(); }
virtual LayoutUnit paddingBefore() const { return computedCSSPaddingBefore(); }
virtual LayoutUnit paddingAfter() const { return computedCSSPaddingAfter(); }
virtual LayoutUnit paddingStart() const { return computedCSSPaddingStart(); }
virtual LayoutUnit paddingEnd() const { return computedCSSPaddingEnd(); }
virtual int borderTop() const { return style()->borderTopWidth(); }
virtual int borderBottom() const { return style()->borderBottomWidth(); }
virtual int borderLeft() const { return style()->borderLeftWidth(); }
virtual int borderRight() const { return style()->borderRightWidth(); }
virtual int borderBefore() const { return style()->borderBeforeWidth(); }
virtual int borderAfter() const { return style()->borderAfterWidth(); }
virtual int borderStart() const { return style()->borderStartWidth(); }
virtual int borderEnd() const { return style()->borderEndWidth(); }
int borderWidth() const { return borderLeft() + borderRight(); }
int borderHeight() const { return borderTop() + borderBottom(); }
// Insets from the border box to the inside of the border.
LayoutRectOutsets borderInsets() const { return LayoutRectOutsets(-borderTop(), -borderRight(), -borderBottom(), -borderLeft()); }
LayoutUnit borderAndPaddingStart() const { return borderStart() + paddingStart(); }
LayoutUnit borderAndPaddingBefore() const { return borderBefore() + paddingBefore(); }
LayoutUnit borderAndPaddingAfter() const { return borderAfter() + paddingAfter(); }
LayoutUnit borderAndPaddingHeight() const { return borderTop() + borderBottom() + paddingTop() + paddingBottom(); }
LayoutUnit borderAndPaddingWidth() const { return borderLeft() + borderRight() + paddingLeft() + paddingRight(); }
LayoutUnit borderAndPaddingLogicalHeight() const { return borderAndPaddingBefore() + borderAndPaddingAfter(); }
LayoutUnit borderAndPaddingLogicalWidth() const { return borderStart() + borderEnd() + paddingStart() + paddingEnd(); }
LayoutUnit borderAndPaddingLogicalLeft() const { return style()->isHorizontalWritingMode() ? borderLeft() + paddingLeft() : borderTop() + paddingTop(); }
LayoutUnit borderLogicalLeft() const { return style()->isHorizontalWritingMode() ? borderLeft() : borderTop(); }
LayoutUnit paddingLogicalWidth() const { return paddingStart() + paddingEnd(); }
LayoutUnit paddingLogicalHeight() const { return paddingBefore() + paddingAfter(); }
virtual LayoutRectOutsets marginBoxOutsets() const = 0;
virtual LayoutUnit marginTop() const = 0;
virtual LayoutUnit marginBottom() const = 0;
virtual LayoutUnit marginLeft() const = 0;
virtual LayoutUnit marginRight() const = 0;
virtual LayoutUnit marginBefore(const RenderStyle* otherStyle = 0) const = 0;
virtual LayoutUnit marginAfter(const RenderStyle* otherStyle = 0) const = 0;
virtual LayoutUnit marginStart(const RenderStyle* otherStyle = 0) const = 0;
virtual LayoutUnit marginEnd(const RenderStyle* otherStyle = 0) const = 0;
LayoutUnit marginHeight() const { return marginTop() + marginBottom(); }
LayoutUnit marginWidth() const { return marginLeft() + marginRight(); }
LayoutUnit marginLogicalHeight() const { return marginBefore() + marginAfter(); }
LayoutUnit marginLogicalWidth() const { return marginStart() + marginEnd(); }
bool hasInlineDirectionBordersPaddingOrMargin() const { return hasInlineDirectionBordersOrPadding() || marginStart()|| marginEnd(); }
bool hasInlineDirectionBordersOrPadding() const { return borderStart() || borderEnd() || paddingStart()|| paddingEnd(); }
virtual LayoutUnit containingBlockLogicalWidthForContent() const;
virtual void childBecameNonInline(RenderObject* /*child*/) { }
virtual bool boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance, InlineFlowBox* = 0) const;
// Overridden by subclasses to determine line height and baseline position.
virtual LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const = 0;
virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const = 0;
virtual void mapAbsoluteToLocalPoint(MapCoordinatesFlags, TransformState&) const override;
virtual const RenderObject* pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap&) const override;
virtual void setSelectionState(SelectionState) override;
void contentChanged(ContentChangeType);
bool hasAcceleratedCompositing() const;
virtual void computeLayerHitTestRects(LayerHitTestRects&) const override;
protected:
virtual void willBeDestroyed() override;
LayoutPoint adjustedPositionRelativeToOffsetParent(const LayoutPoint&) const;
bool calculateHasBoxDecorations() const;
RenderBoxModelObject* continuation() const;
void setContinuation(RenderBoxModelObject*);
LayoutRect localCaretRectForEmptyElement(LayoutUnit width, LayoutUnit textIndentOffset);
bool hasAutoHeightOrContainingBlockWithAutoHeight() const;
RenderBlock* containingBlockForAutoHeightDetection(Length logicalHeight) const;
public:
// These functions are only used internally to manipulate the render tree structure via remove/insert/appendChildNode.
// Since they are typically called only to move objects around within anonymous blocks (which only have layers in
// the case of column spans), the default for fullRemoveInsert is false rather than true.
void moveChildTo(RenderBoxModelObject* toBoxModelObject, RenderObject* child, RenderObject* beforeChild, bool fullRemoveInsert = false);
void moveChildTo(RenderBoxModelObject* toBoxModelObject, RenderObject* child, bool fullRemoveInsert = false)
{
moveChildTo(toBoxModelObject, child, 0, fullRemoveInsert);
}
void moveAllChildrenTo(RenderBoxModelObject* toBoxModelObject, bool fullRemoveInsert = false)
{
moveAllChildrenTo(toBoxModelObject, 0, fullRemoveInsert);
}
void moveAllChildrenTo(RenderBoxModelObject* toBoxModelObject, RenderObject* beforeChild, bool fullRemoveInsert = false)
{
moveChildrenTo(toBoxModelObject, slowFirstChild(), 0, beforeChild, fullRemoveInsert);
}
// Move all of the kids from |startChild| up to but excluding |endChild|. 0 can be passed as the |endChild| to denote
// that all the kids from |startChild| onwards should be moved.
void moveChildrenTo(RenderBoxModelObject* toBoxModelObject, RenderObject* startChild, RenderObject* endChild, bool fullRemoveInsert = false)
{
moveChildrenTo(toBoxModelObject, startChild, endChild, 0, fullRemoveInsert);
}
virtual void moveChildrenTo(RenderBoxModelObject* toBoxModelObject, RenderObject* startChild, RenderObject* endChild, RenderObject* beforeChild, bool fullRemoveInsert = false);
enum ScaleByEffectiveZoomOrNot { ScaleByEffectiveZoom, DoNotScaleByEffectiveZoom };
IntSize calculateImageIntrinsicDimensions(StyleImage*, const IntSize& scaledPositioningAreaSize, ScaleByEffectiveZoomOrNot) const;
private:
LayoutUnit computedCSSPadding(const Length&) const;
virtual bool isBoxModelObject() const override final { return true; }
};
DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderBoxModelObject, isBoxModelObject());
} // namespace blink
#endif // RenderBoxModelObject_h
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